I have a PMI 72ci/3K psi HPA tank and the burst disk blew. There are two on there one directly behind the pressure gauge and another behind and above the fill nipple. I think the one behind the presuure gauge blew, it's 5K psi. the other is rated at 1.8K psi. When it blew it was still attached to my gun. However I unscrewedd it from the gun while the burst disk was stilll letting the air out. I think my gun's o.k. but I know the burst disk will need replacing. How do I go about it for this tank? Is it hard to do and should I try to find paintabll store to do it. ( The closest one I know is a lil' over an hour away.) What all do I need to replace it, should both disk be replaced? I have seen some burst disk for sale on action village .com but I don't know what else i would need for the job. Please help. Thanks.